Xwick



(No Model.)

P. D. HEDDERWIOK.

BRAKE FOR- VELOGIPED'ES.

Patented Nov. 20, 1888.

PATENT Fries.

rnnor D. HEDDERWICK, or ACTON,

COUNTY OF MIDDLESEX, ENGLAND.

BRAKE FOR VELOCIPEDES.

SPECIFICATION forming part of Letters Patent No. 393,230, dated November 20, 1888.

Application filed .Tune 26, IP88. Serial No. 278,214. (No model.)

Patented in England December 24, 1887, No. 17,715 1 in France June 2,1888,No.190,984, and in Belgium June 13, 18.58130. 82,l-7fi.

10 all whom it may concern:

Be it known that I, PERcY DAVID HEDDER- 'WICK, a citizen of England, residing at 10 Heathlicld Road, Acton, in the county of Middlesex, England, have invented a new and useful Improvement in Brakes for 'Velocipedes and other Vel1icles,-(for which I have obtained patents in France, dated June 2, 1888, No. 190,981; in Belgium, dated June 13, 1888, N0. 82,176, and have made application for patent in Great Britain, dated December 24, 1887, No. 17,745,) of which the following is a specifieation.

IVhen a flexible strap is drawn close round I 5 the brake-drum of a velocipede or other vehicle,in order to retard or stop its revolution, this is usually done by pulling the one end of the strap while the other end remains fixed. Although this is effective when the drum revolves in the one direction, it is apt to be inefficient when the drum revolves in the opposite direction, as the friction in that case tends to draw the strap in opposition to the pull applied to it, and so loosens'the brake.

My invention relates to means'of connecting and working the brake-strap in such a manner that it is efficient whether the brakedrum revolves in the one direction or the other. For this purpose I connect both ends of the brake-strap to the brake lever or pull in such a manner that when this lever or pull is moved, straining the strap, only one end of the brake-strap is moved by it, the other end being drawn and made to bear against a fixed stop by the friction of the strap on the drum acting in the direction of the drums revolution. Each end of the strap being thus provided with a stop according as the drum revolves in the one direction or the other, the 49 one or the other end of the brake-strap becomes for the time a fixture, while the other end of the brake-strap is moved with the brake lever or pull away from its stop, tightening the brake.

Figures 1, 2, and 8 of the accompanying drawings are diagrams illustrating my improvements; and Figs. 1, 5, and 6 are side views of parts of brake drums or wheels, with several modified arrangements, according to my invention, of the connections to the brake strap.

In these figures the same reference-letters are employed, as far as possible, to indicate corresponding parts.

A is the brake wheel or drum.

B is the flexible brake-strap having its two ends, 0 and D, which usually are pin-joints, serving to connect the strap to the fixed stop and to the pull, respectively. As indicated in Fig. 1, the two ends 0 and D are connected together by a chain or flexible band, E, passing over a pulley mounted on the pull 1?. According as the drum A revolves in the one direction or the other the one or the other of the two pins 0 or D is brought against a fixed stop, 0 or d, the other of the two pins being drawn away from its stop by the strain of the pull 1. As indicated in Fig. 2, the two ends 0 and D of the brake-strap are jointed to two arms of a T-levcr, F, to the third arm of which the pull P is connected. Instead of a T-lever, a straight lever may be used, as indicated by the dotted lines F. As indicated in Fig. 3, the two ends of the brake are attached to the ends of a lever, L, having the pull 1? attached to its middle.

In the arrangement shown in Fig. 4, instead ofa pull, a pushing-rod, I, isjointed to thelong arm of the T-lever F, and the brake-strap is jointed to its short arms at O and D. The stop for O is at the end 0 of a slotted hole in the supporting-frame G, and the stop for D is at the edge of the frame at d.

In the arrangement shown in Fig. 5 the pull P isjointed to about the middle of a lever, L, the one end of which-is connected by a link, H, to the one end, D, of the brake-strap, the other end being jointed to one arm of a lever, K, which is pivoted at IlZ on the fixed frame G. The other arm of the lever Kis jointed to the end 0 of the brake-strap, and the lever K has a tail which abuts at c on the tubular part V of the [ixed frame, this abutment constituting the stop for the end 0 of the brake-strap. The pin D finds its stop at (Z, the end of a slotted hole in the frame G.

In the arrangement shown in Fig. 6 the pull 1 is jointed to about the middle of about lever, L, one arm of which is connected by a link, H, to the brake end D, the other arm by a link, M, to a strap, N, which passes partly round the tubular part V of the frame and is 5 jointed to the brake end 0. The steps for G and D are respectively the ends cand d ofslot ted holes in the fixed frame G.

Although I have shown arrangements of brakes of a form suitable for veloeipedes,niodi- 1o fled arrangements might be made suitable for other vehicles.

Having thus described the nature of my invention and the best means I know for carrying the same into practical effect, I clain1- 15 In a brake fora velocipede or other vehicle,

a flexible brake-strap having both its ends eonnected to the brake pull or lever, in combination with a fixed stop for each of these ends, substantially as and for the purpose set forth. W

In testimony whereof I have signed my name 20 to this specification,in the presence oftwo subscribing witnesses, this 11th day of J une,A. I). 1888.

P. D. HEDDER\VIOK.

\Vitncsses:

OLIVER IMRAY, Patent Agent, 28 Southampton Buildings, London, TV. 0.

Y J NO. P. M. MILLARD, Clerk to Messrs. Abel it I'm-my, 28 Southampton Buildings, London, IV. C. 

